<?php

namespace Spark\Environment;

use Psr\Log\LoggerAwareInterface;
use Psr\Log\LoggerAwareTrait;
use Spark\SparkApplication;
use Symfony\Component\Console\Input\InputInterface;
use Symfony\Component\Console\Output\OutputInterface;
use Symfony\Component\Console\Style\SymfonyStyle;
use Symfony\Component\Dotenv\Dotenv;

class Environment
{

    private bool $loaded = false;

    private array $config;

    public function __construct(array $config)
    {
        $this->config = $config;
    }

    public function getProjectDirectory(): string
    {
        return $this->config['project_dir'];
    }

    public function getConfigDirectory(): string
    {
        return $this->config['config_dir'];
    }

    public function getDefinedScripts(): array
    {
        return array_keys($this->config['scripts']??[]);
    }

    public function getScriptRunner(): ScriptRunner
    {
        $runner = new ScriptRunner();
        $runner->setDirectory($this->getProjectDirectory());
        foreach ((array)$this->config['scripts'] as $name => $script) {
            $runner->defineScript($name, $script);
        }
        return $runner;
    }

    public function readConfig(string $filename, bool $global=false): ?array
    {
        $path = ($global ? getenv("HOME")."/.config/spark" : $this->getConfigDirectory());

        $filepath = $path . "/" . $filename;
        $dirname = dirname($filepath);
        if (!is_dir($dirname) || !file_exists($filepath)) {
            return null;
        }

        $json = file_get_contents($filepath);

        return json_decode($json, true);
    }

    public function writeConfig(string $filename, $config, bool $global=false)
    {
        $path = ($global ? getenv("HOME")."/.config/spark" : $this->getConfigDirectory());
        $filepath = $path . "/" . $filename;

        $dirname = dirname($filepath);
        if (!is_dir($dirname) && $global) {
            mkdir($dirname, 0777, true);
        }

        $json = json_encode($config, JSON_PRETTY_PRINT|JSON_UNESCAPED_SLASHES);
        file_put_contents($filepath, $json);
    }

    public function loadEnvironment()
    {
        if ($this->loaded) {
            return;
        }

        if (!array_key_exists('project_dir', $this->config)) {
            return;
        }
        chdir($this->config['project_dir']);

        $envfile = $this->config['project_dir']."/.env";
        if (file_exists($envfile)) {
            $dotenv = new Dotenv();
            $dotenv->load($envfile);
        }

        $blacklistFile = $this->config['config_dir']."/blacklist";
        if (file_exists($blacklistFile)) {
            $blacklist = json_decode(file_get_contents($blacklistFile), true);
        }

        if (empty($this->config['preload'])) {
            fprintf(STDERR, "Error: Missing or malformed spark.json file.\n");
            exit(1);
        }

        // $this->logger->info("Loading environment...");
        $preloads = [];
        $root = $this->config['project_dir'];
        foreach ((array)$this->config['preload']??[] as $preload) {
            if (str_contains($preload,'*')) {
                array_push($preloads, ...glob($root."/".$preload));
            } else {
                array_push($preloads, $preload);
            }
        }
        
        foreach ($preloads as $item) {
            if (!str_starts_with($item, "/")) {
                $item = $this->getProjectDirectory() . "/" . $item;
            }
            if (is_file($item) && fnmatch("*.php", $item)) {
                // $this->logger->debug("Preloading file {$item}");
                try {
                    include_once($item);
                } catch (\Throwable $t) {
                    fprintf(STDERR, "warning: Error preloading %s: %s in %s on line %d\n", $item,  $t->getMessage(), $t->getFile(), $t->getLine());
                    //$this->logger->error("Error preloading {$item}: {$t->getMessage()} in {$t->getFile()} on line {$t->getLine()}");
                }
            } elseif (is_dir($item) && file_exists($item."/sparkplug.php")) {
                //$this->logger->debug("Preloading plugin {$item}");
                try {
                    include_once($item."/sparkplug.php");
                } catch (\Throwable $t) {
                    fprintf(STDERR, "warning: Error preloading plugin %s: %s in %s on line %d\n", $item,  $t->getMessage(), $t->getFile(), $t->getLine());
                    //$this->logger->error("Error preloading plugin {$item}: {$t->getMessage()} in {$t->getFile()} on line {$t->getLine()}");
                }
            } else {
                // fprintf(STDERR, "warning: Could not preload %s\n", $item);
                // $this->logger->warning("Could not preload {$item}");
            }
        }

        SparkApplication::$instance->getPluginManager()->initializePlugins();

        $this->loadResources();
    }

    private function loadResources()
    {
        $resourceFile = $this->getConfigDirectory() . "/resources.json";
        if (!file_exists($resourceFile)) {
            return;
        }

        $json = json_decode(
            file_get_contents($resourceFile),
            true
        );
        foreach ($json['resources'] as $name=>$uri) {
            [$type, $uri] = explode("+", $uri, 2);
            create_resource($name, $type, uri:$uri);
        }
    }

    public static function createFromDirectory(string|null $directory=null, bool $parents=false): ?Environment
    {
        $directory = realpath($directory) ?? getcwd();
        
        if ($parents) {
            $check = $directory;
            while (!glob("{$check}/.spark*")) {
                $p = dirname($check);
                if ($p == $check) break;
                $check = $p;
            }
            if (strlen($directory) > 1) {
                $directory = $check;
            }
        }

        $candidates = [ $directory . "/.spark.json", $directory . "/spark.json", $directory . "/.spark/spark.json" ];
        $config = [];
        while ($candidate = array_shift($candidates)) {
            if (!file_exists($candidate)) { continue; }
            $json = file_get_contents($candidate);
            if (!$json || json_last_error()) {
                throw new \RuntimeException("Error parsing {$candidate}: ".json_last_error_msg());
            }
            $config = json_decode($json, true);
            $config['project_dir'] = realpath($directory);
            $config['config_dir'] = realpath($directory)."/.spark";
            $config['config_file'] = $candidate;
            break;
        }

        if (!$config) {
            return null;
        }
        $env = new Environment($config);

        return $env;
    }

    public function expandString(string $input): string
    {
        return preg_replace_callback('/([\%\$]\{(.+?)\}/', function ($v) {
            print_r($v);
        }, $input);
    }

}